Mechanical movement.



0. H. SLAFTER.

MECHANICAL MOVEMENT. APPLICATION FILED NOV.18. 1907.

922,532, Patented May 25, 1909.

rue NORRIS PETERs co., WASHINGTON, n. c

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Urban H lyl'er I Vw Guam IIEITED %TATE% ORREN H. SLAFTER, OF LOSANGELES, CALIFORNIA.

MECHANICAL MOVEMENT.

Application filed November 18, 1907.

To alt whom it may concern:

Be it known that I, ORREN H. SLAFTER, a citizen of the United States ofAmerica, and a resident of Los Angeles, in the county of Los Angeles andState of California, have invented certain new and useful Improvementsin Mechanical Movements, of which the following is a specification.

.his invention relates to mechanical movements especially designed forsafely and firmly holding elevator cars and similar vehicles subject tothe force of gravity.

The object of the invention is to provide a simple, effective anddurable mechanical movement of this class in which dislocation of theparts and wear thereof is reduced to a minimum.

IVith these and other objects in view the invention consists of certainnovel features of construction, combination and arrangement of parts aswill be more fully described and particularly pointed out in theappended claims.

In the accompanying drawings, Figure 1 is a front elevation of a portionof an elevator car equipped with this improvement showing the parts inunlocked position; Fig. 2 is a top plan View thereof; Fig. 3 is a viewsimilar to that shown in Fig. 1 with the parts in locked position; andFig. 4: is a vertical section taken on line 4& of Fig. 1 showing thewedge member in front elevation.

In the embodiment illustrated, a portion of an elevator car frame A isshown, at tached to two main levers B by a shaft or pin M, preferablyextending therethrough at a point midway of the length thereof and whichare attached by means of a shaft I to the lower ends of uprightlaterally spaced hanger pieces Or bars F and at the other end by meansof a pin 0 to the lower end of a pair of uprights G whereby the entireweight of the car and its appurtenances is supported by the shaft M, thelevers B, the hanger pieces F and the link C. A coiled spring K ispreferably arranged on a rod K which extends through the frame A andthrough one arm of an L-shaped bracket K secured to the bars F, thespring being normally compressed on said rod between said arm and a nutsecured to the upper end thereof and tends to start the downwardmovement of the parts on the breakage of the cable. The upper ends ofthe pairs of Specification of Letters Patent.

Patented May 25, 1909.

Serial No. 402,774.

levers or bars F and G are connected by vertically spaced cross bars Dand E mounted at one end between bars F and at the other end betweenbars G and are pivotally connected at both ends thereto. The ends ofsaid bars D and E project beyond the members G and are pivotallyconnected at their ends at Q, and It, respectively to a clutch block Iarranged within a canaliculated guide L. A wedge-like member H isarranged to operate between the inner inclined or cam face G of themembers G and the guide L for a purpose to be described. This wedgemember H is constructed, as shown in Fig. 4., in the form of the letterH with the cross bar H arranged between the bars D and E and with theupright members it and 7t arranged on opposite sides of the bars D andE.

The link 0 is pivotally connected at one end between the upright orhanger bars F intermediately of their ends and at its other end ispivotally connected between the lower ends of the members Gr preferablyby means of a pivot O which extends through said members G and through aslot 0 arranged longitudinally of said link C. A suspending or operatingcable N is connected at one end to the upper end of the hanger bars Fand normally supports the weight of the elevator or other car and itsappurtenances.

Immediately the cable breaks or becomes disconnected the hanger pieces Fmove downwardly and the levers B tilt to about five degrees more orless, which causes the shaft or stud O to ride upward in the slot O andthereby causes the inner ends of the bars D and E to move upward adistance equal to the downward movement of the hanger bars F wherebysaid levers D and E are inclined in a manner corresponding to the leversB and the wedge member H is forced up by the bar D between the taperedor inclined faces of the members G and the gibs of the canaliculatedguide L and thus causes the clutch block I to bear on the inner sides ofsaid gibs producing a clutch action which is assisted by the weight ofthe car connected therewith and securely locks the car against furtherdownward movement. The gripping power so obtained is so great that it isimpossible for the wedge H. and clutch block I to slip or move on thegibs of the guide L.

From the foregoing description, taken in conn ection with theaccompanying drawings, the construction and operation of the inventionwill be readily understood without requiring a more extendedexplanation.

Various changes in the form, proportion and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of this invention as defined in theappended claims.

I claim as my invention 1. In a mechanical movement the combination of alever adapted to be pivoted intermediately of its ends, a hanger barpivoted at one end to one end of said lever, a cam faced memberpivotally connected to the other end of said lever, a clutch leverpivoted at one end to said hanger member and at its other end to saidcam faced member and projecting therebeyond, a clutch head mounted onthe end of said clutch lever, a guide member, and a wedge-like memberarranged between the cam faced member and said guide and means foroperating said members to lock said wedge-shaped member and said clutchhead on opposite sides of said guide member. I

2. In a mechanical movement the combination of a lever adapted to bepivoted intermediately of its ends, a hanger bar pivoted at one end toone end of said lever, a cam faced member pivotally connected to theother end of said lever, a clutch lever pivoted at one end to saidhanger member and at its other end to said cam faced member andprojecting therebeyond, a clutch head mounted on the end of said clutchlever, and a wedge-like member arranged between the cam faced member andsaid clutch head, a guide member arranged between said wedge member andsaid clutch head, and spring means for operating said members to causesaid wedge-shaped member and said clutch head to bind against said guidememher.

3. The combination with an object to be v supported of a lever pivotedintermediately of its ends thereto, a hanger bar pivotally connected atone end to one end of said lever, suspension means connected to theother end of said bar, a cam faced member pivotally connected at one endwith the free end of said lever, a bar pivoted at one end to said hangerbar and having a longitudinally extending slot in its other end forpivotal connection with said cam faced member, clutch levers pivotallyconnecting said cam faced member with said hanger bar and projecting atone end beyond said cam faced member, a canaliculated guide, a clutchhead pivotally connected with said projecting ends and arranged withinsaid canaliculated guide, and

a wedge member arranged between the cam faced member and the gibs ofsaid guide.

In witness whereof I have hereunto set my hand.

()RQREN H. SLAFTER.

lVitnesses M. L. TRIMBLE, D. H. J onus.

